Furnace.



J. H. LAUX.

FURNACE. APPLICATION FILED NOV.21,1908.

Patented Aug. 2, 1910.

UNITED STATES PATENT OFFIOE.

Joan H. LAUX, or s'r. LOUIS,

MISSOURI, ASSIGNOB TO AMERICAN FURNACE COMPANY,

OF ST. LOUIS, MISSOURI.

FURNACE.

To all whom it may concern: Be it known that 1, JOHN H. LAUX, a citizen of the United States, and resident of St. Louis, Missouri, have invented certain new and useful Improvements in Furnaces, of which the, following is a specification containing a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof. My invention relates generally to furnaces, and more particularly to the construction of the fire pots thereof, the object t my invention being to provide a' simple, inexpensive fire pot and to arrange a series of air inlet members in the wall of the fire pot, thus providing for the delivery of air to all sides of the body of fuel withinthe 4 line 2-2 of Fig. 1; Fig.3 is a perspective view of one of the air inlet members used in the construction of the fire pot; and Fig. 4 is a vertical section taken through the center 'of one of the bricks or devices used in the fire potof my improved construction.

Referring by numerals to the accompanying drawings: 1 designates the outer shell or wall of-a furnace, 2 the inner shell or. wall thereof, 3 the grate ring supported on brackets 4 in the lower portion of the inner shell 2, and there being narrow spaces 5 between the outer edge of said ring 3 andthe inner face of the shell or wall 2. Arranged within the grate ring 3 is a series of ordinary gratebars 6, and formed in the lower portions of the inner and outer shells l and 2, and below the grate, bars is the draft inlet 7.

8 designates a series of bricks or tile which form a circular wall around the interior of the inner shell 2. and form the lower portion of the fire pot, and the lower outer corners of these brick or tile are cut away, as designated by 9, to form an annular chamber 10,

Specification of Letters Patent.

immediately above the spaces 5 between the grate ring 3 and the shell 2.

Arranged between the brick or tile- 8 are the vertically disposedair inlet members 11,

Patented Aug. 2, 1910.

Application filed November 21, 1908. Serial No. 463,825.

formed of cast iron or analogous material,

said members being hollow and openat the -frontand rear,jand the lower. outercorners of said members are cutaway, as designated by 12, in order to coincide with the cut-away lower corners of the brick or tile 8.

In the construction of an ordinary fire pot utilizing my improved air inlet members, said members combine with a row of brick or tile to form the lower half of the fire pot, and a row of brick or tileis arranged immediately on top of the first row of brick or tile and the air inlet members, which construction is clearly shown in Fig. 1. By cuttmg away the lower outer corners of the brick or tile and the air inlet me iers, the

annular chamber 10' is formed entirely around the lower outer edge of the fire pot, and air entering the draft inlet 7 passes upward through the spaces 5 into this an nular chamber and passes from thence upward throughthe air inlet members 11 and discharges therefrom in thin jets which are arranged at equal distances apart entirely around the bed of'fuel upon the gratebars and within the fire pot, and this even distribution of the draft to the fire promotes combustion, thereby burning all of the gas generated from the fuel within the fire pot and consuming nearly all of the smoke arising from the'fire. Any ashes from thefire within the fire pot which may enter the air inlet members will drop to the bottoms thereof and will finally discharge through 1tghe spaces 5 into the ash pit below the grate ars.

A fire pot of my improved construction .is simple, inexpensive, and can be cheaply constructed, and as it is only necessary to are range the .air inlet members between the brick or tile, the fire pot can be installed by an ordinary workman without the use of special tools or fittings.

I claim: 1

1..In a furnace, a fire pot comprising a circular wall of fire proof material, a series of air inlet hollow block's arranged at suitabledistances apart in said fire proof wall, which air inlet hollow blocks are provided with completely closed top ends and par Ice tially closed bottom ends, the vertical side walls of each block being spaced apart from the upper end wall to the lower end wall so as to form a continuous opening completely and the wall of the furnace,

between said walls.

2. In a furnace provided with a grate and a circular grate ring, which grate ring is spaced apart from the inner shell of the furnace, a fire pot comprising a wall of fire proof material supported on the grate ring, the lower outer edge of which wall is cut away above the space between the grate ring and a series of air inlet hollow blocks arranged at suitable distances apart in said fire proof wall, which air inlet hollow blocks are provided with completely closed top ends and partially closed bottom ends, the vertical side walls of each block being spaced apart from the upper end wall to the lower end wall so as to form a continuous opening completely between said walls.

3. The combination with a circular wall forming the fire pot of a furnace, of a series of air inlet hollow blocks arranged at suitable distances apart in the wall, all of which air inlet hollow blocks are provided with completely closed top ends and partially closed bottom ends, the vertical side walls of each block being spaced apart from the upper end wall to the lower end wall so as to form a continuous opening completely be tween said walls.

4t. The .herein described furnace, const-ructed with the usual grate, a circular grate ring for supporting the grate on the furnace wall, which grate ring 'is spaced apart from the furnace wall, a fire-proof wall supported on the outer edge of the grate ring and forming the fire pot of the furnace, the lower'outer edge of the fireproof wall being cut away, and a plurality of air inlet hollow blocks arranged in the fire pot wall, said air inlet hollow blocks being provided with an opening in their front faces and the lower outer corners of each of the hollow blocks being cut away so as to conform with the cut away portion of the fireproof wall.

5. In a furnace, provided with a grate ring spaced apart from the wall of the furnace, a fire-proof lining supported by said grate ring, a metal hollow block positioned on said grate ring within the fire-proof linmg and which block is provided with an upper end completely closed by an end wall, the lower end of said block being partially closed by an end wall, said up er and lower ends being parallel, side wa ls connecting said upper and lower end walls, said side walls being spaced apart so as to provide anelongated opening between the top wall and the lower end wall.

6. A lining for fire pots, consisting of a series of fire-proof blocks having their outer lower corners cut away and an air inlet block having its outer lower corner cut away, said air inlet block having a closed upper end and side walls spaced apart and angularly disposed in relation to each other so as to form between the side walls of said block an inwardly tapered opening extending longitudinally of the blcck, said air inlet block being placed between two of said fire-proof blocks.

In testimony whereof, I have signed 'my name to this specification, in presence of two subscribing wltnesses.

J OHN H. LAT? Witnesses:

M. P. SMITH, E. L. WALLACE. 

